Keeping Up with the Joneses Preferences: Asset Pricing Considerations
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1 Keeping Up with the Joneses Preferences: Asset Pricing Considerations Fernando Zapatero Marshall School of Business USC February 2013
2 Motivation Economics and Finance have developed a series of models and theories. Many of them, especially in finance, are very recent. Based on these models, we try to understand how investors and markets behave: The predictive power of the models is not very good. Even worse: we do not seem to be able to explain many events ex post. For example: Market efficiency. CAPM
3 Efficient Markets Concept: All relevant information is immediately incorporated into prices. Therefore, there is no gain to be attained by picking securities... Refinement: there are different levels of information and, therefore, market efficiency: 1. Past prices: If prices immediately incorporate this information, markets are weakly efficient. 2. Public information, available to everybody: semi-strong form. 3. Public and private information: strong form. Non-informational events should not matter: For example, a big sale in the market.
4 0 l -I < Abnormal Returns Around Takeover Announcements 30 Exchange 1s Organized DATE Traded on an Model-Companies ANNOUNCEMENT -45 C.)~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ TO Figure: From Keown and Pinkerton, Journal of Finance 1981 Residuals-Market RELATIYE -60 DAYS Average -105 Cumulative Figure o o ooo 36.,,, w w w en -J 864 The Journal of Finance
5 CAPM Similar failures.
6 Characteristics of Investors and Consumers Models assume some properties of investors that drive their economic decisions: Monotonicity or non-satiation: More is better. But: What about charities, phylantropy, volunteer work...? Risk-aversion: The expected return of a risky decision is worth more than the risky decision. But: What about gambles either real gambles or through financial markets or similar? The objective of the investor is represented by a utility function, for example: [ ] X 1 γ max E 1 γ X represents wealth and γ the coefficient of risk-aversion.
7 Other Problems with Standard Models of Investors Take utility function of an investor who cares about consumption over time (intertemporal consumption): max E [ T t=0 ] β t c(t)1 γ 1 γ - β < 1 is a subjective discount coefficient ( earlier is better ), c(t) is consumption at moment t and γ is as before; - for a total of T periods (for example, years). Many questions: 1. At time t only consumption c(t) matters? 2. Only a parameter, γ to decide choices? 3. Why is β constant? 4. Why is T fixed? 5. All the investors are identical? 6....
8 Problems with Standard Preferences People preferences appear inconsistent with expected utility: One particular instance is Allais Paradox: Offer people to choose one of the gambles from each experiment: Experiment 1 Experiment 2 Gamble 1A Gamble 1B Gamble 2A Gamble 2B Prize Chance Prize Chance Prize Chance Prize Chance $1 M 100% $1 M 89% Nothing 89% Nothing 90% Nothing 1% $1 M 11% $5 M 10% $5 M 10% The choices are often inconsistent with expected utility.
9 Allais Paradox Revisited Rewrite the previous menu of gambles as follows: Experiment 1 Experiment 2 Gamble 1A Gamble 1B Gamble 2A Gamble 2B Prize Chance Prize Chance Prize Chance Prize Chance $1 M 89% $1 M 89% Nothing 89% Nothing 89% $1 M 11% Nothing 1% $1 M 11% Nothing 1% $5 M 10% $5 M 10% Independence axiom. Kahneman and Tversky developed the Prospect Theory to better capture these choices. It also has to do with framing.
10 Alternative Directions The finance literature has suggested a number of reasons why classic models do not work: 1. Noise traders. 2. Limits to arbitrage. 3. Bounded rationality. 4. Heuristics and biases. 5. Preferences. In addition (not explicit in the behavioral finance literature): 1. Heterogeneity of economic investors. 2. Unusual incentives.
11 Non-Standard Preferences Prospect Theory is a first attempt to model consumers behavior outside the classic paradigm. Other types of utility representations different from standard utilities have been developed. Here are some examples: Recursive preferences. Habit formation. Keeping up with the Joneses. Rank-dependent utilities. Cumulative prospect theory is one case....
12 Prospect Theory: Foundations Experiments conducted by Kahneman and Tversky in the 70 s. Allais Paradox and others like the following. A group of people is asked same group both questions: (i) Choose between (percentage who chooses in parenthesis): A Sure gain of $240 (84%). B 25% chance to gain $1000, 75% chance to gain zero (16%). (ii) Choose between (percentage who chooses in parenthesis): C Sure loss of $750 (13%). D 75% chance to lose $1000, 25% chance to lose nothing (87%). The previous choices imply risk-aversion for gains, risk-love for losses. In fact, 73% chose A and D, only 3% B and C. However, B+C dominates A+D.
13 Value Function of Prospect Theory: Characteristics Decreasing sensitivities, both for gains and losses from the reference point: The difference in value of possible gains of $100 and $200 is larger than the difference between $1100 and $1200. The difference in value of possible losses of -$100 and -$200 is larger than the difference between -$1100 and -$1200. Characteristics of a value function for prospects: (i) Defined on deviations from reference point. (ii) Concave for gains, convex for losses. (iii) Steeper for losses than for gains.
14 the utility function postulated by Markowitz [29] which is relatively shallow in that region. The Value Function VALUE LOSSES GAINS FIGURE 3.-A hypothetical value function. Figure: Value Function in Kahneman and Tversky (1979)
15 Rank-Dependent Utilities In the 90 s, Kahneman and Tversky refined prospect theory. Cumulative prospect theory. Adjust original probabilities: By assigning weights. Different for probabilities of gains and probabilities of losses. This had a precedent in the work of Quiggin in the 80 s: Anticipated utility. Some work in mathematical finance. For example, He, X. D. and X. Y. Zhou (2011), Portfolio Choice via Quantiles, Math. Finance 21,
16 The Problem with Prospect Theory (and Similar Theories) They are ad hoc and not axiomatic. Need for axiomatic models. A good candidate: Keeping Up with the Joneses preferences.
17 Motivation Consider the following two worlds (Frank, JPubE, 2008): A You earn $110,000 per year, all others earn $200,000. B You earn $100,000 per year, all others earn $85,000. Which one would you prefer. Frequent choice is incompatible with standard utility theory. Happiness and growth: Relative income is a better predictor of happiness than absolute income. First pointed out by Easterlin in Several studies are consistent with this observation. Evidence that income matters for happiness.
18 Growth and Happiness in Japan Are Positional Externalities Different? page 5 Average reported level of well-being in surveys (10 = extremely happy) Happiness Index of Japanese GNP, per capita (1960 = 100) Income Figure Figure: 1. Average FromHappiness R. Veenhoven, vs. Average Happiness Income inover Nations, Time in IMF, Japan 1993 Source: R. Veenhoven, Happiness in Nations, International Monetary Fund, The pattern shown in Figure 1, which consistently shows up in other countries
19 Income and Happiness (USAre inpositional the 80s) Externalities Different? page 6 Figure 2. Income Vs Satisfaction in the US, Figure: From Diener, Sandvik, Seidlitz, and Diener, SIR, 1993
20 Basic Idea People care about their consumption/wealth relative to other people s consumption/wealth. Keeping up with the Joneses. Some closely related issues: Consumption in positional goods. Also called conspicuous consumption. Search for status. Differs from standard expected utility theory. A very large number of economic and financial implications. In the choice of consumption. In the choice of portfolios. Through this, on security prices.
21 Precedents Mentioned by Adam Smith (The Wealth of the Nations): A creditable day-labourer would be ashamed to appear in public without a linen shirt, the want of which would be supposed to denote that disgraceful degree of poverty which, it is presumed, nobody can well fall into without extreme bad conduct. Veblen (The Theory of the Leisure Class, 1899). Introduces the expression conspicuous consumption. Duesenberry (Income, Saving, and the Theory of Consumer Behavior, 1949). Introduces the demonstration effect. Robert Frank (Choosing the Right Pond, 1985) Several books and research articles on the topic and its economic implications.
22 Utility Function with Relative Wealth Concerns The investor chooses investments to achieve: max E c1 γ 1 γ C α c is the consumption of the investor. C is the consumption of the peers. γ is the risk-aversion, as in the standard case. α is a positive coefficient that measures the strength of the relative concerns: The higher is α the more the consumer cares about the level of consumption of the peers. Who are the peers? Neighbors? Family? Coworkers?
23 Economic Effects Wealth increase of one agent affects utility of other agents. Negative (or positive?) externality on others. Increases marginal utility. Relative wealth concerns lead to status seeking. Status seeking leads to purchase of positional goods. Positional goods displace other consumption. Possible barrier to growth? Economic cascades (Robert Frank): If someone spends on a positional good, it forces others to do so. For example, median size of a newly constructed house feet in feet in Like an arms race?
24 Effects of Economic Cascades? Also suggested by Robert Frank. People are working longer hours. Longer commuting distances. Higher bankruptcy rates. In Frank, Levine,and Dijk (2010, wp). They study changes between 1990 and 2000 in bankruptcies filings across counties. They find positive correlation between filings and growth of income dispersion. Savings: According to standard theory, the savings rate should be independent of income. However, it has been dropping consistently in the US.
25 ngs rate went negative (although no longer reflected on the Fed s charts), but since this crisis began has turned b ulling USin Savings their spending Rate while deleveraging by paying off debt. Below is the chart of the Personal Savings rate, i ws the personal savings AMOUNT in billions of dollars: Figure: From BEA
26 Financial Effects Consider a setting in which agents care about each other s wealth. Suppose that the wealth of at least some of them is correlated with security prices. For example, software engineers who receive bonuses depending on the performance of the company. Their income will be highly correlated with the price of the stock of their company. In general, with prices of high-tech companies. Buying stock correlated with wealth/income of reference group will be optimal strategy. In such a setting, investors will be willing to overpay for stock that helps them keep up with their peers.
27 Financial Effects: Equilibrium Consider a CAPM type of equation, r i = r f + β i ( r M r f ) Re-write, r i = a + β i r M With relative wealth concerns we get, r i = a + βi M r M + βi I f I where β M is as before, β I is the correlation with the income of the peers, f I measures the premium associated with the correlation with income. Is negative. If there are different groups of peers, r i = a + βi M r M + βi 1 f 1 + βi 2 f
28 Further Issues Explains relation between stock returns and labor income. Risk premia are stronger (in absolute value) in areas of lower population density. Is the effect stronger in areas of lower population density? There is evidence that this is the case. Luxury car purchases are strongly influenced by luxury car purchases of neighbors in areas of lower population density. In areas of low population density is easy to identify peers. Stronger peer pressure.
29 The Future Many questions on the economic front: Keeping Up or Catching Up? Who is the reference group?... On the mathematical front: Very little work. Exceptions: Chan and Kogan (JPE 2002), a dynamic version of Campbell and Cochrane (JPE 1999). Benchmarking models (for example, work of Basak and coauthors).
Copyright (C) 2001 David K. Levine This document is an open textbook; you can redistribute it and/or modify it under the terms of version 1 of the
Copyright (C) 2001 David K. Levine This document is an open textbook; you can redistribute it and/or modify it under the terms of version 1 of the open text license amendment to version 2 of the GNU General
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